Hi,
I'm glad that you like the plugin. Of course I shall answer your questions:
an invalid flight plan is set by Euroscope. So if a callsign hasn't got a flight plan or Euroscope decides that this flight plan is invalid, the request will be deleted.
throwing out the request means that the request will be deleted.
the request system works like this: someone asks you for clearence. You don't have time to give the clearence or there are 5 people at once asking for clearence. So you can simply "make a note" for yourself as pictured in the screenshots provided which one needs clearence and in what sequence they called. So you can work the list chronologically. So basically it's their request which you don't want to forget.
I hope I could help you!
Your add-in looks like it would really help me, and I particularly like the timers feature, but there is something that I don't understand.
The readme says "throws out every request, that has an invalid flight plan or which ground speed exceeds 80 knots".
What constitutes and invalid flight plan? What does "throws out" mean in this context? "Request"... Which request? Their request? My request?